/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Classes/IpNetDriver.h
Also usable to test the 'restart handshake' feature, using the 'net RecreateSocket' command.
Returns the action taken (e.g. successfully kicked off recreation, or whether this failed or is already in progress etc.)
[UE::Net::ERecreateSocketResult](API\Plugins\OnlineSubsystemUtils\UE__Net__ERecreateSocketResult) RecreateSocket ( int32 OverridePort )